Which one of these salts will form a basic solution on dissolving in water? A. NaCl...

Which one of these salts will form a basic solution on dissolving in water?

A. NaCl

B. KCN

C. NaNO₃

D. NH₄NO₃

E. FeCl₃

Expert Solution

Consider the structure of acids and bases. Acids are generally of the form AH, with conjugate bases of A-. Bases are often of the form BOH, with conjugate acids of B+.
Strong acids/bases have weak conjugate bases/acids, and weak acids/bases have strong conjugate bases/acids

a) NaCl. Na+ is a conjugate acid of NaOH, a strong base. Cl- is the conjugate base of HCl, a strong acid. they are about equal in strength, so the solution is neutral

b) KCN. K+ is a conjugate acid of KOH, a strong base. CN- is the conjugate base of HCN, a weak acid. CN- must be a stronger base than K+ is a strong acid, so the solution is basic.

c) NaNO3. Na+ is a conjugate acid of NaOH, a strong base. NO3- is the conjugate base of HNO3 (nitric acid), a strong acid. They will be about equal in strength, so the solution will be neutral

d) NH4NO3. NH4+ (ammonium) is the conjugate acid of NH3 (ammonia), a moderately strong base. NO3- is the conjugate base of HNO3 (nitric acid), a strong acid. Ammonium is a stronger acid than Nitrate is a base, so the solution will be acidic.

E. FeCl3- Fe3+ and 3Cl-. This solution will be neutral

queen_honey_blossom answered 1 year ago

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Which one of these salts will form a basic solution on dissolving in water? A. NaCl...

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